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PreprintCC BY 4.0arXiv

Comments on bfη' nuclei and on the Λ binding energy of the hypertriton

  • Avraham Gal
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Abstract

I briefly discuss two apparent puzzles: (i) is the observation of η'(958) bound states in 11C at GSI [1] compatible with a nearly vanishing real part of η'N scattering length [2]? and (ii) is the Λ binding energy of the hypertriton (Λ3H), the lightest particle-stable hypernucleus, very small (63+38−31 keV, J-PARC E73 [3]) or very large (523±76 keV, MAMI [4])? Here, I suggest that MAMI's observed weak-decay pion momentum peak originates from Λ7He, not from Λ3H \cite{Gal26}.

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Cite

BibTeXRIS
BibTeX
@misc{gal2026comments,
  title = {{Comments on $\bfη'$ nuclei and on the $Λ$ binding energy of the hypertriton}},
  author = {Avraham Gal},
  howpublished = {arXiv},
  year = {2026},
  month = oct,
  doi = {10.48550/arxiv.2610.40173},
  eprint = {2610.40173},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2610.40173},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Comments on bfη' nuclei and on the Λ binding energy of the hypertriton
AU  - Avraham Gal
PY  - 2026
DA  - 2026/10/29
PB  - arXiv
DO  - 10.48550/arxiv.2610.40173
UR  - https://arxiv.org/abs/2610.40173
AB  - I briefly discuss two apparent puzzles: (i) is the observation of η'(958) bound states in ^11C at GSI [1] compatible with a nearly vanishing real part of η'N scattering length [2]? and (ii) is the Λ binding energy of the hypertriton (_Λ^3H), the lightest particle-stable hypernucleus, very small (63^+38_−31 keV, J-PARC E73 [3]) or very large (523±76 keV, MAMI [4])? Here, I suggest that MAMI's observed weak-decay pion momentum peak originates from _Λ^7He, not from _Λ^3H \cite{Gal26}.
ER  -